view dyncall/dyncall_call_arm32_arm.h @ 27:523c45dfa8fb

- refactored arm calling conventions' callvm code, so that the code that keeps the caller from overwriting the return value on some platforms also works on OpenBSD (before we casted the function pointer to have long long as return type, to hint the caller that there is one, but that triggers an intentional SIGABRT on OpenBSD for security reasons; now the decl reflects this, directly)
author cslag
date Tue, 15 Sep 2015 12:48:52 +0200
parents 3e629dc19168
children f5577f6bf97a
line wrap: on
line source

/*

 Package: dyncall
 Library: dyncall
 File: dyncall/dyncall_call_arm32_arm.h
 Description: 
 License:

   Copyright (c) 2007-2015 Daniel Adler <dadler@uni-goettingen.de>, 
                           Tassilo Philipp <tphilipp@potion-studios.com>

   Permission to use, copy, modify, and distribute this software for any
   purpose with or without fee is hereby granted, provided that the above
   copyright notice and this permission notice appear in all copies.

   THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

*/



/*

  dyncall 32bit ARM32 family interface (ARM mode)

  REVISION
  2007/12/11 initial

*/


#ifndef DYNCALL_CALL_ARM32_ARM_H
#define DYNCALL_CALL_ARM32_ARM_H


#include "dyncall_types.h"

#ifdef __cplusplus
extern "C" {
#endif

/* 
** arm32 arm mode calling convention calls 
**
** - hybrid return-type call (bool ... pointer)
**
** Note the return type of this declaration is intentially of double-word size.
** On some platforms (FreeBSD/arm, Nintendo DS, ...) the compiler generates cleanup code
** in the caller (dc_callvm_call_arm32_arm) that reuses, thus overwrites r0 and r1.
** With this "hint", we preserve those registers by letting the compiler assume both
** registers are used for the return type.
*/

DClonglong dcCall_arm32_arm(DCpointer target, DCpointer stackdata, DCsize size);

#ifdef __cplusplus
}
#endif


#endif /* DYNCALL_CALL_ARM32_ARM_H */